Jehovah’s Witnesses are a Christian denomination with more than 8.2 million members worldwide. The group is known for distinct practices like evangelizing door-to-door at people’s homes, rejecting blood transfusions and not observing birthdays or other holidays considered to be pagan.

Houston is not the only black celebrity to join the religion. The late great music legend Prince became a Jehovah’s Witness in 2001. Tennis star Serena Williams grew up as a Jehovah’s Witness, as did the Notorious B.I.G and Michael Jackson.